Gas regulator with safety device

A regulator comprising:

• a main body having a circumferential side wall and a partition plate defining an upper recess and a lower recess within the main body;
• a stud member attached to lower portion of the side wall of the main body to define an inlet chamber in the lower recess;
• an inlet pipe attached to the side wall of the main body and defining an inlet passage communicating the inlet chamber;
• a diaphram made of flexible material and mounting on top of the main body to define an outlet chamber in the upper recess;
• a cap member mounting on top of the main body to secure the diaphram in position;
• an outlet pipe attached to the main body and defining an outlet passage communicating the outlet chamber;
• a first passage vertically formed in the partition plate to intercommunicate the inlet and outlet chambers and having an entrance at lower end;
• a rubber ring attached to the entrance of the first passage;
• a second passage having a vertical portion bent at a lower end to communicate the first passage and intercommunicating the inlet and outlet chambers through the entrance of the first passage;
• a third passage extending through the stud member and vertically in alignment with the first passage;
• a first knob member having a shank extending into the third passage and rotatably maintained in position by means of a thread engagement for a height adjustment relative to the rubber ring;
• a steel ball locating in the inlet chamber and resting on top of the shank of the first knob member under the rubber ring;
• a piston member slidably mounting in the first passage and adapted to be pressed to move downwardly with a lower end thereof extending through the rubber ring;
• a normally-closed valve fitting in the second passage and adapted to be pressed to open;
• a plate member attached to bottom of the diaphram;
• a second knob member having a shank extending through the cap member and rotatably maintained in position by means of a thread engagement for adjustably pressing the diaphram to deform to press the valve to open with the plate member;
• a fourth passage sequentially formed in the plate member, the diaphram and the shank of the second knob member vertically in alignment with the first passage;
• an actuating post fitting in the fourth passage and adapted to be pressed to push the piston member to move downwardly;
• a pressure gauge having an inlet end communicating the inlet chamber of the main body;
• and
• a flow rate gauge having an inlet end communicating the second passage in the main body.